<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="./vue-2.4.0.js"></script>
</head>
<body>
    <div id="app">
        {{msg}}
        <button type="text" @keyup.tab="tab">点击</button>
    </div>
    <script>
        let vm=new Vue({
            el:'#app',
            data:{
                msg:'123'
            },
            methods:{
                tab(){
                    console.log(tab);
                }
            }
        })
    </script>
</body>
</html>